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/* libguestfs - the guestfsd daemon
* Copyright (C) 2009 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "daemon.h"
#include "actions.h"
#define PROCFILE "/proc/sys/vm/drop_caches"
int
do_drop_caches (int what)
{
FILE *fp;
if (sync_disks () == -1) {
reply_with_perror ("sync");
return -1;
}
fp = fopen (PROCFILE, "w");
if (fp == NULL) {
reply_with_perror (PROCFILE);
return -1;
}
fprintf (fp, "%d", what);
if (fclose (fp) == EOF) {
reply_with_perror (PROCFILE);
return -1;
}
return 0;
}
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